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No. -29?21=A5.4 Patented. Feb. 12, A188A.

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' UNITED STATES PATENT EEicE.

ABRAHAM o. rammen WAYNEsBoeouGH, PENrTsYLvANTA-'I kSPARK-ARRESTER.

SPECIFICATION forming` part of Letters Patent No. 293,445, datedFebruary 12, 1884. V

' Application filed November 19, 1883. (No model.)

To a/ZZ whom it may concer/1,

Be it known that I, ABRAHAM O. Falck, a citizen of the United States,residing at Vaynesborough, in the county of Franklin and State ofPennsylvania, have invented certain new and useful Improvements inSpark-Arresters, of which the following isadescription.

Figure l is a `vertical lsection of the sparkarrester at the upper endof the smoke-stack.

Figs. 2, 3, and 4L are similar views of the modified forms of the same.l

My invention relates to that class of sparkarresters in which the coneof the smoke-v stack is provided inside with a sleeve, arrangedconcentrically around the upper end of the smoke-pipe, and above whichsleeve is ar,- :ranged afdeliector. Y

My invention consists in the peculiar construction of said deflector, incombination with .the other parts, as Vwill be hereinafter fullydescribed.

ln the drawings, A represents the upper end of the smoke-stack ofsteam-boiler, and B B is the double conical upper end thereof, intowhich the pipe A protrudes a short distance, as at a. double cone tapersinwardly to the smoke pipe, and the upper portion, B, tapers inwardly toan opening, g, and is provided with an upwardly-projecting llangc,b, anda downwardlyprojecting flange, c.

C is a short sleeve arranged in the lower cone, B, concentrically withrespect to the smoke-pipe A, and of a larger diameter than the same, andextending down a short distance upon the outside of the said smoke-pipe,upon which it is mounted by means of bolts d, and

between which' and the smoke-pipe there ex.

ists an annular space. The sleeve may be tapered convergently at thetop, as in Fig. l, or it maybe a true cylinder, as in Fig. 2, and theremay be one, as in Figs. l and 2, or more of the same, each higher oneoverlapping the lower one, as in Figs. 8 and 4. Just above the top ofthis sleeve is a deiiector of peculiar construction. It consists of ahorizontal ring or short cylinder, D, of sheet metal, in which and nearits middle is placed a circular head, D', having its edgelangedfdownwardly, as at e, to fit snugly in the sleeve. This deliecto'ris of larger diameter than the subjacent sleeve, and is sustained inconcentric relation thereto The lower portion, B, of the` by radialbraces f, extending to the outer cone. N ow, when the exhaust blows upthrough the pipe A, the sparks are driven forcibly upward against thedeflector D D, Vand are more or less shattered and driven outwardly anddownwardly against the lower cone section. At the same time the force ofthis bla-st induces a strong draft in the annular space b etween thesleeve C and the end a or the smoke pipe, and this catches the` sparksand solid particles and carries them into the central draft again, wherethey are again violently dashed against the deflector D D and stillfurther shattered and reduced in size. This circulation of the largersparks is continued in the direction of the arrows until they becomeground up and brokeninto fine particles, which, as soon as they becomefine enough to exert no dangerous influence, pass, by reason of theirloss of inertia, along with the lighter vapor and gases out through thecentral opening, g, in the top of the smoke-stack. If any particles ofsparks, by reason of their buoyancy, pass above the dellector, they arecaught by the flange c and hurled down into the basin or receptacleformed uponthe top of the delectorhead D by the upperprojecting edgeofthe ring D, where they accumulate in alield of deposit which iscomparatively quiescent or undisturbed by the activity of the draft.This derlector, it will be seen, is a featureof great simplicity andmerit, for it is cheaply made of two pieces of sheet-iron7 and while itperforms the double function of a dellector and a receptacle forescaping sparks, it is very light and strong, and is free from the greatinertia ject to wear, is easily and quickly replaced in the ring D whenworn out.

Having thus described my invention, what I claim as new is`- l. Thespark-arrester consisting of the combination ofthe deliector D D',composed of a ringor" sheet metal with a circular sheet-metal IOO'flanged head inserted near its middle, the subjacent sleeve C, thedouble conical inclosure B B', and the smoke-pipe A, extending up andone 0r more sleeves, C, having its lower 1Q and into thesaid sleeve,substantially as and end arranged to overlap the sm0ke-pipe A for thepurpose described. and leave an annular space between, substan- 2. Thespark-arrester consisting of the comtially as shown and described.

5 bination of the deieetor D D', composed of a ring of sheet metal witha circular sheet-metal ABRAHAM O' FRICK flanged head inserted near itsvmiddle, the Vitnesses: double conical ease B B', having flanges b andD. M. GOOD, J r., c, the smoke-pipe A, protrudingnto the same, D. H.HOOVER.

